title: Observation of photorefractive surface waves in self-defocusing LiNbO3:Fe crystal.
abstract: Photorefractive (PR) surface waves (SWs) in self-defocusing LiNbO(3):Fe are studied theoretically and experimentally. We demonstrate that SWs can also be formed in a self-defocusing nonlinear medium and that the nonlocal nonlinearity (such as the diffusion component of PR nonlinearity in this Letter) is the essential cause. The forming process of PR SWs with a self-deflection course of light beams has been observed. The results indicate the possibility of concentrating light energy in self-defocusing media, taking advantage of SWs.
authors.forename: D P
authors.initials: DP
authors.lastname: Yang
authors.forename: Z P
authors.initials: ZP
authors.lastname: Chen
authors.forename: F
authors.initials: F
authors.lastname: Zhao
authors.forename: H Y
authors.initials: HY
authors.lastname: Yu
authors.forename: T H
authors.initials: TH
authors.lastname: Zhang
authors.forename: J G
authors.initials: JG
authors.lastname: Tian
authors.forename: J J
authors.initials: JJ
authors.lastname: Xu